Britain's Catherine (C), the Duchess of Cambridge, her husband Prince William (R), the Duke of Cambridge, and Prince Charles (L), the Prince of Wales, leave by carriage after attending the Order of the Garter procession and installation service at Windsor Castle in southern England, June 16, . The Order is the senior and oldest British Order of Chivalry, founded by Britain's King Edward III in 1348. REUTERS/Toby Melville (BRITAIN - Tags: SOCIETY ANNIVERSARY ROYALS) ... Britain's royal family members leave by carriage after attending the Order of the Garter procession and installation service at Windsor Castle in southern England ... 16-06- ... WINDSOR ... United Kingdom ... Photo credit should read: TOBY MELVILLE/WPA Rota. Unique Reference No. ... in Windsor, UK, on Monday June 16, 2014. Photo by Arthur Edwards/PA Wire/ABACAPRESS.COM16/06/2014 - Windsor - Photo